Geodynamical Events (Coal-and-Gas Outbursts) in the Donets Basin, Ukraine

Panova, O. A.; Pryvalov, V.A.; Izart, Alain; Alsaab, D.; Antsiferov, A. V.

doi:10.3997/2214-4609.201400154

Cited by 4 publications

(3 citation statements)

References 0 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…У 21-ому столітті трагічні події, зумовлені раптовими викидами вугілля та газу, трапилися у копальнях Китаю, України, Турції, Індії, Польщі та ін. [1,2]. У багатьох випадках через високий тиск газового потоку було зруйновано системи підземної вентиляції; великий обсяг метану перенесено у суміжні виробки, де його концентрація призвела до вибухів.…”

Section: вступunclassified

Geochemical Triggers of Coal and Gas Outbursts Derived From Rock-Eval Thermolytic Analysis

Panova¹,

Pryvalov²,

Sachsenhofer³

2023

MGeo

View full text Add to dashboard Cite

Purpose. Investigation of the conditions for the occurrence of coal and gas outbursts from a geochemical point of view. Methodology. The paper examines and analyses the results of determining bituminous and hydrogen indices using the Rock-Eval thermolytic analysis method on safe and dangerous areas of coal seams in terms of coal and gas outbursts. Results. It was established that on safe mining seams, coal samples are within the oil window, where microcracks in the coal mass may still contain films of sorbed bituminous components (liquid hydrocarbons), which counteract the accumulation of energy of elastic deformations and the localization of gas accumulation. However, the transition from the area of liquid hydrocarbon generation to the gas window leads to a sharp increase in the volume of generated hydrocarbon gases, mainly due to the cracking of liquid hydrocarbons, that is, the emergence of geochemical triggers for the localization of coal and gas outbursts during coal mining. Scientific novelty. The new experimentally determined values of bituminous and hydrogen indices for coal seams of the Donetsk basin, and their comparison with the results within safe and dangerous mining seams, demonstrate the fact that all the studied coal samples from outburst-prone areas geometrically lie in the area of the gas window, starting from the moment of cracking of already formed liquid hydrocarbons and subsequent generation of dry hydrocarbon gases (mainly methane) due to the thermal degradation of higher carbon compounds first, and then low carbon compounds (wet hydrocarbon gases) and direct generation from the kerogen matrix. Practical significance. Established geochemical criteria that determine the conditions for the occurrence of gas-dynamic phenomena - outbursts of coal and gas during coal mining. Key words: coal and gas outbursts, bitumen index, hydrogen index, microcracks, hydrocarbon generation, gas window.

show abstract

Section: вступunclassified

Geochemical Triggers of Coal and Gas Outbursts Derived From Rock-Eval Thermolytic Analysis

Panova¹,

Pryvalov²,

Sachsenhofer³

2023

MGeo

View full text Add to dashboard Cite

show abstract

“…Analysis of the state of the study of the existing native experience regarding the threats of flooding associated with the closure of coal mines Numerous works by Ukrainian scientists give environmental monitoring and coverage of the consequences of the closure of mines. As evidenced by studies of Rudko and Yakovlev [3,4], Dovgiy et al [5,6], Dovgyi and Korzhnev [7], Shybetskyi et al [8], Panova et al [9], Goshovskyi and Zurian [10], Trofymchuk et al [11,12], Anpilova et al [13], Dolin et al [14], Lyuta and Sanina [15]. During the full-scale development of the mining area, the geological environment becomes the primary "depot" of the majority of man-made emissions and mechanical, physical and chemical effects on the components of the environment (ground atmosphere and surface hydrosphere, soils, the upper zone of the lithosphere, etc.…”

Section: Introductionmentioning

confidence: 96%

Satellite-based technology assessing Ukraine’s ecology under the war

Khodorovskyi,

Apostolov,

Yelistratova

et al. 2023

IOP Conf. Ser.: Earth Environ. Sci.

View full text Add to dashboard Cite

The Donbas is a region dominated by heavy industry, particularly coal mining, chemical processing sites and metallurgy. Intensive mining and steel smelting led to substantial environmental damage before the armed conflict. The fighting in eastern Ukraine has exacerbated an already fragile ecological situation, introducing a range of new risks – of stray munitions hitting extensive chemical and industrial facilities or interconnected mines being flooded and poisoning the water throughout the region. Besides, one of the main hazards is flooding territories associated with closing coal mines. Assessment impacts of uncontrolled mine flooding and towns and villages and associated hazardous processes of surface and groundwater contamination, surface subsidence and dangerous deformations of residential and industrial buildings and other facilities carried out the remote sensing and geological data.

show abstract

“…Overseas, because of the hardness of the gas drainage, a lot of deep mines of the same situation in France, Germany, former Soviet Union, Poland, turkey and so on have to reduce output or even close [3] . On the other hand , with the depletion of shallow resource, many other coal mines in Russia, the United States, Canada and Australia gradually come into deep mining times and the problem of troublesome gas drainage in Chuandong also troubles them [4][5] . Therefore, the study of feature of pore, fracture and permeability has great significance for Chuandong area as well as the world.…”

mentioning

confidence: 99%

Features of Coal Pore & Fracture in Chuandong and their Relationship with Extra-Low Permeability

Mao¹,

Tang²,

Jian³

et al. 2012

AMR

View full text Add to dashboard Cite

The comparative datas from home and abroad indicate that extra-low permeability of coal seam is the basic reason why the gas outbursts obviously demonstrate three features in Chuandong. Further analysis on the microstructure of coal pore and fracture show that, firstly，the quantity of micro pores is much more than that of macro pores; the total volume of the pores is large while the volume of interconnected pores is small. This is helpful to gas storage but going against gas flow. Secondly, fracture density varys with magnification; there are many short fractures but only a few long fractures; all of the fractures are similar in width and in the form of zigzag; the directivity of fracture extension is irregular. Thirdly, fracture fillings are mainly hard inorganic matters. It is put forward that both pressure sensitive effect and water sensitivity effect exist in the coal seam and they are "double-edged swords" to permeability. In order to increase the permeability, it is necessary to change passive exhausting into active driving, remove gas reservoir and provide the passageway for gas dissipation.

show abstract

Geodynamical Events (Coal-and-Gas Outbursts) in the Donets Basin, Ukraine

Cited by 4 publications

References 0 publications

Geochemical Triggers of Coal and Gas Outbursts Derived From Rock-Eval Thermolytic Analysis

Geochemical Triggers of Coal and Gas Outbursts Derived From Rock-Eval Thermolytic Analysis

Satellite-based technology assessing Ukraine’s ecology under the war

Features of Coal Pore & Fracture in Chuandong and their Relationship with Extra-Low Permeability

Contact Info

Product

Resources

About